Github user andrewor14 commented on a diff in the pull request: https://github.com/apache/spark/pull/8639#discussion_r42300506 --- Diff: core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/MesosSchedulerBackend.scala --- @@ -207,23 +211,44 @@ private[spark] class MesosSchedulerBackend( */ override def resourceOffers(d: SchedulerDriver, offers: JList[Offer]) { inClassLoader() { + // Fail first on offers with unmet constraints + val (offersMatchingConstraints, offersNotMatchingConstraints) = + offers.asScala.partition { o => + val offerAttributes = toAttributeMap(o.getAttributesList) + val meetsConstraints = + matchesAttributeRequirements(slaveOfferConstraints, offerAttributes) + + // add some debug messaging --- End diff -- remove (doesn't add any value)
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